Locking-switch.



Y G. BURKHARDT.' LOCKING SWITCH. APPLICATION mso 1AN. ao, 191s.

Patented May 2, 1916.

To all fw/wm z't may concernf s Be 1tknown that I, .lr's'rAvE BUnKHAnnT,

a citizen ofthe United States, yresiding at Chicago,` in the county'jof Cook and `State of Illinois, have invented certan'il'nen1 and useful `Improvements 1n Locking-Switches,

of which the following is aspecication.

This invention relates to a locking switch particularly adapted to control and'lock the electrical-'circuits of a motor-drivenvehicle,

Aalthough not necessarily limitedto such use.

Theft and' 'i'manthori'zed use of motor- 4`driven vehicles, may be readily prevented by locking the switch' which controls thev usual circuits from the battery and magneto to the "sparking devices and i-t is one ofA the objects 4,ofthe present invention Vto'pro'vide a switch 'ot relatively simple and lnexpensive construction' Which'may'be locked in neutral position and which may be released and' actuated to4 'close either the battery ormagneto circuits 4bymeans* of a'suitable key.

Itis a further' object 'of my invention to provide a. `locking'swit'clrin'ivhich thev key .may be withdrawn afterthe switch has been moved therebyto eithe'rfoi'` itsy positions.'y

' is a still further object of my ifl'enfim to-provide means whereby it is impossible to open"tlie` casing inclosing the `mechanisin ivithouttheaid of the proper key.

Other objects and-advantages of myl in-4 vention `will `appear as it is betternnderstood by reference to the folloiving'specitication in jas in Which-ff. i

Figuirer 1y is a front'k elevation of the invention; Fig,y QI is Lavertical section therethroughi 'Figf a section" on the line 3;2

of Fie; 2f' 'Fidi tis la rearfelevation ot' the connectionwith the accompanying drawing casing@ Fien-ft is a Section on' the lined) ot Fig;` 2; Fig. G is adetail in perspective of the' bridge, "and Fig. "Vis a detailins'ection on the line `Tal-" of Fig' of. the means for securing the 4bridge to the base.-

of insulatingmaterial- Upon the base l a.

Switch arm 2, alsoJ of insulating material, is

ivotally mounted, `the svvitchf arm carrying a knifeblade 3 adapted tocoperate at either end with clips 4 and 5 having extensions (3 and 7 mountednpon the vbase 1, f'alrrournling the binding `screws 8 andi), disposed therethrongh.l The Iclips l and v5 at either sidejof thedevice are connected through suitable Wires" 10 and 11 with o ne side of the .i Specification ofletters Patent.

casing' 26.

Referringto the'dravvings, 1 indicates :1 base of suitable rform constructed preterably GUSTAVE BURKHARDT, 0E CHICAGO, ILLINOIS.

Patented May 2,1916.

Application mea `January so, 1915. serial No. 5,225.

battery and magneto circuits,- respectively, the wires beingy disposed about the binding screws Sand 9 and held in vclose 'relation with the-extensions 6 and 7 otthe clips by washers 12. Upstanding lugs 12 integral with the base 1 prevent lateral movement of the .wires 10 and 11 to allow Contact thereof with the knifeblade 3. T 11e opposite sides of the battery and magneto circuits are connected by Wires 13' and 14, respectively, to the binding screws^15 and 16 and therethrough to a i plate 17 supported on the base and .carrying a clip 18 adapted'to engage,- at all times, the knife blade 3. The clip 18 is provided with a lug 1.9 which copera'tes with' an'opening position ofthe knife blade 3 in which position it engages neither of the clips 4' and Surrounding the binding screws 84 and' 9 above the Washers 12 are insulating collars 21v whiclrsupportthe i'eet of the bridge Q3. The feet Q2 are provided. ivith bifurcated ends 24, which are adapted to be bent around the' collars 21, as indicated in Fig. 3, when the device is assembled, to rigidly hol d 'Q0 inthe knifeblade 3 to indicate the neutral the bridge in its proper positiunpthe bridge being insulated by the collars :21. from the binding screws S and 9. rlvli'e'lnidge 253 com- ;prises acironlar plate `having a circular vopening 25 and radiating openings Q5 therei' in,"corres'ponding in general torni to a cross.A

` Afm'etallic casingQG oit' suitabletorm is adapted to'be mounted upon -the base 1 and vheld vin proper relation therewith by screws 27 passing therethrough and into threaded 'sleeves' 28'in the lugs Q5), integral with the talee: fThe' casing 2G is 1'n'mfide-d with inwardly extending pins 2G which cooperate 'with the lugs29ot the base 1 to prevent relative angular movement ot the base Q `in the A lock 30 ot the cylinder type comprising a rotatable cylinder 31 and spring-actuated plungers 32, operable by va key to release the cylinder 31, is mounted in the casing 26, a collar 34 being threadcdly l mounted on the look beneath the` casing 26 to rigidly hold 1t 1n cooperative relation there- 'with A spindle 35, having a flange 36, Ais .se-j

cured by means ofA screws 37 to the inner end of the look cylindn` 31' and projects in wardly through a central opening in the switch arm; vA Switch actuating m'emlier 37 is loosely journaled upon the' spindle 35 and prevented from longitudinal movement th'ereotl byengagement with the Shoulder 38 onthe lspindle and by a suitable fastening means 39 4at the end of the spindle. The

one" Aside with inwardly 'extendmg lugs 40 .2,afi1d 'on its opposite side with a'jlug 41 ...adapted to engage a lug 42 on the 'flange 36 of the spindle y35.

The central portion of the switch actuatbridge 23, these arms vbeing adapted, as clearly shown in Fig. 2, lto engage beneath*- Ythe-bridge, whereby the casing 26 may be locked in properrelation vto the. .basel irre-- spective of whether screws 27 `are in position or not."

The. operation ofthe device will 'it fis thought, be apparent without furtherv description of the structure thereof. The

mechanism is assembledby 'mov'fingj the switch arm 2 until it contactswith the abut- .ment formediby'lug29 at the'left ofF-ig. 3,

whereupon the kn1fe blad'e..3' engages the. clip 4, closing the battery circuit." With the llock cylinder. in key-removing 'position .as vindicated 'in Fig. j 1, Vthe switch. actuating.

member 37 is .turned as far as possiblein -a lclock-.wise direction, viewing F1 .-4, in

which position the arms 43 will registerwith 'i the openings 25 in the-bridge23 .and the casing26 may be mounted -in prop erposif tion *upon the base 1.A By-inserting the key 23 and turning A.the lock cylinder 31 in .a

' @removed out of registerwith 'the openings clock-wise directiomfviewing Fig. -1,- -'the g arms A43 of the s'witch-actuating member .37

25 andthe casingf26is thereby held rigid v .to thel base 1, the casing being'prevented from angular movement relative thereto vby the pins 26. The" screws 27' are then inserted to provide additional holding means for the casing. The structure being assembled,

the switch arm 2 maybe moved ineither direction by the key 33, toengage the knife blade 3 w1th either of the clips 4 or 5 to close the battery. ori magneto circuits, ,or the switch arm 2 may be moved to neutral positionwith the lug 19 on the clip 18 engagirhlg vthe opening 20 in the-,knife blade 3.` e

marks on thejface. of the lock, as shown in Fig.` 1, indicate the position of thekey when the knife blade- 3y .isy in engagement .with

either of the clips 4- or 5 or in neutral position. The lugs 41` and 42 on the 'sw-itch-v actuating member 37 and theflange 36 of the spindle 35, respectively, form' a lostmotion connection .between the lock cyllnder 31 and the switch-actuating member 37, the

lost motion beingsubstantiallv equal to a A half revolution of the lock cylinder'31, and

it will be apparent that by reason of the lost engaging suitable notches in the'switch arm I motion connection the lock cylinder 31 may be returned to the key-removing position, as swltch-actuating member 37 is. rovided on' blade-This is a particularly advantageous feature of myinvention since the operator frequentlycarries the key vattached to others .and it `'is' not desirable to have the key remain in the lock while the vehicle is in .operation.v To dismount the casing 26fror`n the base 1 it is necessary only to remove the screws 27, insert the key vandturnv the switch untilV the' knife blade 3 engages the clip 4, in which lposition the arms' 43 register with -the openings 25 and the casing 26 may be lifted .from the base 1. `It is obvious, of course,

that 'whileI have described a particular arv vrangement ofthe arms 43 and the openings in the bridge -23 the parts may bearranged to re .ister upon turning the switch-actuating mem er 37 Vto any .definite position. The battery-circuitclosing position is the 'position-least used andone in'which the switch would not ordinarily be left and it will be' readily 'seen that unless the knife blade is in engagement-with the clip l4, in the embodiment shown in the drawings, access'to the mechanism can not be had by mere removal of the screws 27 and hence tampering with the mechanism is impossible unless a key of proper configuration is available.

It will be 'apparent thatvarious changes may be made 11n the form, construction and 1 arrangement of the parts without departing from the spirit and scope of the invention or sacrificingany of its material advanta es, the formfl hereinbefore described. being merely a preferred embodiment thereof.

'-'providing a lost motion connection therebetween.

2. In a' device ofthe character described, the combinationofa base, aswitch mounted thereon, a lockcomprisin `agrotatable cyl- 3. In a device of the character described,

` the combination of a base,'a switch mounted inder andlkey fcontrollab e; means to nor- `vl 11ally' .prevent .frotation' thereof, a flanged thereon, a casing, alock secured to said casing andv comprising a rotatable cylinder and key controllable ineans to normally prevent rotation thereof, a flanged` spindle secured to saidI cylinder, means journaled on said spin- `dle having'lugs thereon adapted to engage and'actuate said switch', cooperating `means `lon said switch actuating means and the `ilangelofsaid spindle providing a lost motion connection therebetween, ,and coperating means on saidbase and switch actuating i means to prevent removalof said casing eX- ccpt when said switch-'actuating means is `disposed ina predetermined angular posif tion.

the vcombination of a base, a switch mounted thereon, acasing, a lock secured to said cas,-

` ing and comprising a` rotatable vcylinder and key controllable: means to normally prevent `rotation-thereof, a flanged spindle `secured `to said cylinder, means journaled on said spindle having lugs thereon adapted to engage and actuate said switch cooperating `means on said switch actuating means and the flange of said spindle providing a lost motion connectiony therebetween, coperating means on said base, and switch-actuating means to prevent removal of s'aid casing eX- `cept when said switch-actuating means is ,'T disposed in a `predetermined angular posi- Ation, screws securing said casing to said g `base and coperating means on'said base and casing to prevent relative angular movement therebetween.

5. In' a device of the character` described, the combination of a base, a Switch mounted thereon, a casing, a lock secured to said casing andcomprising a rotatable cylinder and `keycontrollable means to normally prevent rotation thereof, a flanged spindlesecured to said cylinder, switch actuating means ournaled on said spindle, coperating means on said switch actuating means and the flange of said `spindle providing a lost motion connection* therebetween, supports on said base, a bridge detachably `secured to said supports, and coperating means on `said vbridge and switch actuating means,

Qkcy controllable incans'to normally prevent rotation thereof, a flanged spindle secured to said cylinder, means ionrnaled on said `spindle having lugs thereon adapted to engage and actuate said switch, cooperating means on Said switch actuating incans and the flange of said spindle providing a.lost motion connection therebetween. supports `4C. Ina device ofthe ycharacter described,

on said base, a bridge detachably secured to saidsupports, cooperating means on' said bridge, switch actuating means to prevent removal of said casing except when said switch actuating means is disposed in a pre- 'determined angular position, screws securing-'said `casing tol said base and coperatingv ineanson said base and easing to prevent rela-tive angular movement therebetween.

7.- In a device of tliecharacter described, ,75

the combination of a base,v a switch mounted thereon, a casing, a lock secured to said cas ingl and comprisingy a cylinder and keycontrollable means to normally prevent 'rotation thereof, supports en said base,'a bridge degg tachably secured to said supports and .span-v ningl said' switch, and means connected to saidgcylinder and `coperating with said bridge to prevent removal of said casing except when said cylinder is moved to a predetermined angular position.

8. In a device of the characterl described,

the combination of a'base, a switch mounted i thereon, a casing, supports on said base, in-

sulating collars on said supports, a bridge '90 mounted on said supports and insulated u therefrom by saidi collars, and means con nected to said casing' and cooperating withv said bridge, whereby removal of said casing is prevented except when said means is dis# v9 3-,

posed in a predetermined angular position.

9. In a. device of the'character described, the combination of a base, a switch mounted thereon, a casing, supports on said base, ini

snlating collars on said supports, a-,b'ridge 10| mounted on said supports and insulated therefrom by said collars, means rotatably connected to said casing` and -copei'ating with said bridge, whereby removal of said casing is prevented except when said meansY is disposed in a predetermined angular position, and cooperating means on said base and casing. to prevent relative angular movement therebetween.

10. In a device of the character ilescribed, 116

the combination of a base, a switch mounted thereon, comprising a member movable to neutral and to 4circuit closing. positions, a iasing. a lock mounted in said casing and comprising a rotatable cylinder and key contiillabl'e means to normally prevent rota",- tion thereof, a key insertible at one angular position of said cylinder, a flanged spindle secured to said cylinder, switch actuating means rotatably moniited on said spindle, 120

and coperating means on said switch actuating means and the flange of said spindle providing a lost motionA connection, whereby upon rotation of said cylinder by saidI .key said switch member may be inovedto either of its positions, vand said cylinder returned to withdraw the key therefrom without disturbing the position otl said switch member.

11. In a device of the cha 'acter described, 1wl

the combination of a base, a switch mounted thereon, a casing, a l'ock secured-to said casing and comprising a cylinder and key-conti'on thereof, supports on said base, insulating collars onsaid supports, a bridge. mountl ed on said supports and insulated therefrom by said collars, and means connected to said cylinder and'coperatingwith said bridge,

` whereby removal of said casing,r is prevented except when said .means isV disposed. in a predetermined angularv position.

.. 12. Ina device of the character describe-d,A

i the combination of a base, a switch mounted thereon, a. casing, aflock secured to said casi ing and comprismg a cylinder and key-com opie's o! this' patent my be obtained for trollable means to normally prevent rotation thereof, supports on 'said base, insulatl ing collars on said supports, a bridge mounttrollable means to normally .prevent 'rotaed on said supports and insulatedtherefrom by saidvcollars, said bridge being provided with an opening, and means connected to said cylinder and providing laterally extending arms adapted to pass thlough said opening' and engage beneath sa d bridge,

lwhereby removal of said casing isprevented except' when said arms are disposed.` in a predetermined angular position.

l GUSTAVE BURKHARDT. Witnesses:.

ERNEST H. MERCHANT, W. T. WfES'rERBERG.

ive cents each, by addressing the @Commissioner ot Intenta,

.Wishingfom D. C. 

